Document the EC2 Metadata HTTP Tokens Config

Author: mletalie

modules/rosa-sts-creating-a-cluster-with-customizations-cli.adoc

@@ -376,6 +376,7 @@ Operator IAM Roles:
  - arn:aws:iam::<aws_account_id>:role/<cluster_name>-xxxx-openshift-machine-api-aws-cloud-credentials
  - arn:aws:iam::<aws_account_id>:role/<cluster_name>-xxxx-openshift-cloud-credential-operator-cloud-crede
  - arn:aws:iam::<aws_account_id>:role/<cluster_name>-xxxx-openshift-image-registry-installer-cloud-creden
+Ec2 Metadata Http Tokens:   optional
 State:                      ready
 Private:                    No
 Created:                    Oct  1 2021 08:12:25 UTC